description Kepler-442 Overview
Kepler-442 is a K-type star about 1,200 light-years away hosting Kepler-442b, a super-Earth in the habitable zone with one of the highest Earth Similarity Index scores among known exoplanets.
insights Why this score
Kepler-442 ranks #59 of 212 in the Star ranking, behind Kepler-22, ahead of Shaula.
High Earth-similarity Kepler candidate host, strong habitability reputation despite distant faint host.
help Kepler-442 FAQ
Is Kepler-442b confirmed to be habitable?
No, being in a calculated habitable zone only means that surface liquid water could be possible under suitable atmospheric conditions. No atmosphere, ocean, or life has been detected on Kepler-442b.
How large is Kepler-442b compared with Earth?
NASA lists Kepler-442b at about 1.34 times Earth's radius and classifies it as a super-Earth. Its precise composition is unknown because a radius does not by itself establish whether a planet is rocky.
How long is a year on Kepler-442b?
Kepler-442b completes an orbit in about 112.3 Earth days at a distance of roughly 0.41 astronomical units from its star. That closer orbit can still lie in the habitable zone because Kepler-442 is cooler and dimmer than the Sun.
How was the planet around Kepler-442 discovered?
NASA's Kepler space telescope detected repeated dips in the star's brightness as Kepler-442b crossed in front of it. The planet was announced as confirmed in 2015 using the transit method.
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